Protect a PDF with a Password
Lock your PDF with a password using real AES encryption, and choose whether people can print, copy or edit it. Everything happens on your device — the file and password never leave it.
How to use Protect PDF
- 1Upload your PDF.
- 2Choose a password, and untick anything people shouldn’t be able to do.
- 3Download the protected PDF — and keep the password safe.
Why use FileDagadu
- Runs entirely in your browser — nothing is uploaded to a server
- No account, signup, or watermark required
- Works on desktop, tablet and mobile
- Free with no daily usage limit
Frequently asked questions
How strong is the protection?
The PDF is encrypted with AES-256 (or AES-128 for older readers), the standard used by modern PDF software. Strength still depends on your password — use a long one.
What if I forget the password?
It can’t be recovered — not by us or anyone else. Store the password somewhere safe.
What do the permission options do?
You can stop people who open the PDF from printing, copying text and images, or editing it. These limits are enforced by PDF software that respects them, and are backed by a separate owner password, which is generated for you if you leave it empty.
Is my file uploaded?
No. Encryption happens in your browser, so the PDF and password never leave your device.
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